Phillips Sumika Marlex® CHP-370 Thermoplastic Polyolefin

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Phillips Sumika Marlex® CHP-370 Thermoplastic Polyolefin (discontinued **)
Categories:	Polymer; Thermoplastic; Polyolefin
Material Notes:	Thermoplastic Polyolefin, Good Stiffness and Impact Performance Applications: Automotive Pillar Trim Conditioning after Molding: 48 hr at 23°C Nominal Shrinkage: 0.8-1.0% Drying conditions Temperature: 80-100°C Time: 2 hours minimum, 4 hours maximum Device: Desiccant Dryer Moisture content: 0.1 wt% max. Molding Temperatures Rear Temperature: 145-200°C Middle Temperature: 210-235°C Front and Nozzle Temps: 210-235°C Stock Temperature: 191-246°C Mold Temperature: 23-50°C Processing conditions Suggested shot size: 50-70% First stage injection pressure: Maximize Screw Speed: 30-60% Packing pressure: Minimize Back Pressure: 50-150 psi Other molding considerations: Melt temperature above 260°C may cause resin degradation and changes to resin properties. To improve dispersion of color concentrates use a screw with a mixing zone or mixing nozzle. Phillips Sumika Polypropylene Company has been shut down, as announced in 2011. This product had been discontinued prior to the shutdown announcement.
Key Words:	Information Provided by Chevron Phillips Chemical
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Physical Properties	Metric	English	Comments

Density	1.00 g/cc	0.0361 lb/in³	ASTM D1505
	1.00 g/cc	0.0361 lb/in³	ISO 1183
Linear Mold Shrinkage	0.0080 - 0.010 cm/cm	0.0080 - 0.010 in/in
Melt Flow	30 g/10 min @Temperature 230 °C	30 g/10 min @Temperature 446 °F	ASTM D1238
	30 g/10 min @Temperature 230 °C	30 g/10 min @Temperature 446 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell R	61	61	ASTM D785
	61	61	ISO 2039
Hardness, Shore D	58	58	ASTM D2240
	58	58	ISO 868
Tensile Strength, Yield	20.7 MPa	3000 psi	50 mm/min; ISO 527
	20.9 MPa	3030 psi	50 mm/min; ASTM D638
Flexural Modulus	1.60 GPa	232 ksi	Secant, 1.3 mm/min; ASTM D790
	1.63 GPa	236 ksi	2.0 mm/min; ISO 178
Izod Impact, Notched	NB	NB	ASTM D256
	0.350 J/cm @Temperature -30.0 °C	0.656 ft-lb/in @Temperature -22.0 °F	ASTM D256
Izod Impact, Notched (ISO)	31.0 kJ/m²	14.8 ft-lb/in²	ISO 180
	3.00 kJ/m² @Temperature -40.0 °C	1.43 ft-lb/in² @Temperature -40.0 °F	ISO 180

Thermal Properties	Metric	English	Comments
Deflection Temperature at 0.46 MPa (66 psi)	102 °C	216 °F	ISO 75
	104 °C	219 °F	ASTM D648
Deflection Temperature at 1.8 MPa (264 psi)	53.0 °C	127 °F	ASTM D648
	54.0 °C	129 °F	ISO 75

**
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